X-Git-Url: https://diplodocus.org/git/nmh/blobdiff_plain/5dd6771b28c257af405d7248639ed0e3bcdce38b..349ccb810b6e89b1830dbbe70c9e805a2773fcbe:/sbr/utils.c

diff --git a/sbr/utils.c b/sbr/utils.c
index 48969abc..7f0760a0 100644
--- a/sbr/utils.c
+++ b/sbr/utils.c
@@ -9,9 +9,7 @@
 
 #include <h/mh.h>
 #include <h/utils.h>
-#include <stdlib.h>
 #include <fcntl.h>
-#include <errno.h>
 
 /*
  * We allocate space for messages (msgs array)
@@ -94,7 +92,7 @@ pwd(void)
  *       -- malloc'ed memory.  Then free "s1".
  */
 char *
-add (char *s2, char *s1)
+add (const char *s2, char *s1)
 {
     char *cp;
     size_t len1 = 0, len2 = 0;
@@ -122,11 +120,24 @@ add (char *s2, char *s1)
     return cp;
 }
 
+/*
+ * addlist
+ *	Append an item to a comma separated list
+ */
+char *
+addlist (char *list, const char *item)
+{
+    if (list)
+    	list = add (", ", list);
+
+    return add (item, list);
+}
+
 /*
  * folder_exists
  *      Check to see if a folder exists.
  */
-int folder_exists(char *folder)
+int folder_exists(const char *folder)
 {
     struct stat st;
     int exists = 0;
@@ -200,17 +211,35 @@ num_digits (int n)
 
 /*
  * Append a message arg to an array of them, resizing it if necessary.
- * The function is written to suit the arg parsing code it was extracted
- * from, and will probably be changed when the other code is cleaned up.
+ * Really a simple vector-of-(char *) maintenance routine.
  */
 void
 app_msgarg(struct msgs_array *msgs, char *cp)
 {
-	if(msgs->size >= msgs->max)
-		msgs->msgs = mh_xrealloc(msgs->msgs, (msgs->max+=MAXMSGS)*sizeof(*msgs->msgs));
+	if(msgs->size >= msgs->max) {
+		msgs->max += MAXMSGS;
+		msgs->msgs = mh_xrealloc(msgs->msgs,
+			msgs->max * sizeof(*msgs->msgs));
+	}
 	msgs->msgs[msgs->size++] = cp;
 }
 
+/*
+ * Append a message number to an array of them, resizing it if necessary.
+ * Like app_msgarg, but with a vector-of-ints instead.
+ */
+
+void
+app_msgnum(struct msgnum_array *msgs, int msgnum)
+{
+	if (msgs->size >= msgs->max) {
+		msgs->max += MAXMSGS;
+		msgs->msgnums = mh_xrealloc(msgs->msgnums,
+			msgs->max * sizeof(*msgs->msgnums));
+	}
+	msgs->msgnums[msgs->size++] = msgnum;
+}
+
 /* Open a form or components file */
 int
 open_form(char **form, char *def)
@@ -226,3 +255,65 @@ open_form(char **form, char *def)
 	}
 	return in;
 }
+
+
+/*
+ * Finds first occurrence of str in buf.  buf is not a C string but a
+ * byte array of length buflen.  str is a null-terminated C string.
+ * find_str() does not modify buf but passes back a non-const char *
+ * pointer so that the caller can modify it.
+ */
+char *
+find_str (const char buf[], size_t buflen, const char *str) {
+    const size_t len = strlen (str);
+    size_t i;
+
+    for (i = 0; i + len <= buflen; ++i, ++buf) {
+        if (! memcmp (buf, str, len)) return (char *) buf;
+    }
+
+    return NULL;
+}
+
+
+/*
+ * Finds last occurrence of str in buf.  buf is not a C string but a
+ * byte array of length buflen.  str is a null-terminated C string.
+ * find_str() does not modify buf but passes back a non-const char *
+ * pointer so that the caller can modify it.
+ */
+char *
+rfind_str (const char buf[], size_t buflen, const char *str) {
+    const size_t len = strlen (str);
+    size_t i;
+
+    for (i = 0, buf += buflen - len; i + len <= buflen; ++i, --buf) {
+        if (! memcmp (buf, str, len)) return (char *) buf;
+    }
+
+    return NULL;
+}
+
+
+/* POSIX doesn't have strcasestr() so emulate it. */
+char *
+nmh_strcasestr (const char *s1, const char *s2) {
+    const size_t len = strlen (s2);
+
+    if (isupper ((unsigned char) s2[0])  ||  islower ((unsigned char)s2[0])) {
+        char first[3];
+        first[0] = (char) toupper ((unsigned char) s2[0]);
+        first[1] = (char) tolower ((unsigned char) s2[0]);
+        first[2] = '\0';
+
+        for (s1 = strpbrk (s1, first); s1; s1 = strpbrk (++s1, first)) {
+            if (! strncasecmp (s1, s2, len)) return (char *) s1;
+        }
+    } else {
+        for (s1 = strchr (s1, s2[0]); s1; s1 = strchr (++s1, s2[0])) {
+            if (! strncasecmp (s1, s2, len)) return (char *) s1;
+        }
+    }
+
+    return NULL;
+}